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Old 10th February 2019, 12:02 AM   #881
hellokitty123 is offline hellokitty123  United States
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Join Date: Dec 2017
Location: Connecticut
Looking at an old ESS guide here
https://www.hobbielektronika.hu/foru....php?id=285448
I happened upon this quote
Quote:
As detailed in the datasheet, the MCLK must be at least 386*Fs for SPDIF inputs and 192*Fs for
Serial/DSD inputs. For optimum jitter tolerance the MCLK should be at least 10% higher than this
theoretical MCLK minimum, this ensures audio clarity free from input clock jitter.
If operating with a synchronous MCLK, it is recommended to use an inverted MCLK. The inverted
synchronous MCLK ensures that the Sabre noise is as low as possible.
Based on this I have a few questions.
Firstly does the MCLK requirement apply to if 128fs mode is enabled?
Because for 44/16 music that's a 5.6448 MHz crystal.
Is there a downside to using a 5.6448 MHz crystal on the ES9038pro in 128fs mode?

Also does the inverted MCLK suggestion apply to their current models?
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Old 16th February 2019, 11:22 AM   #882
ferrilu1 is offline ferrilu1  Italy
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Click the image to open in full size.

Sorry for this silly question anyone does know the name or the code part of this three pins connection between Buffalo and Legato stage. I need the longest one
Thanks
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Old 16th February 2019, 03:58 PM   #883
ferrilu1 is offline ferrilu1  Italy
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Ok solved
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Old 17th February 2019, 03:29 PM   #884
stefanhgm is offline stefanhgm  Europe
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While I am still unable to use the BBB input to listen with my Buffalo-IIIsePro38 (separate problem: Problems with BBB-Hermes-Cronus for Buffalo-IIIsePro38 build.) I have some general questions concerning my future build:

1) I power my Buffalo-IIIsePro38 from a Low Current Dual Power Supply that was recommended when I bought it. However, the power supply gets very hot after a couple of minutes already. So, I thin switching to a single Centaur supply would be a better choice?

2) In addition to my BBB-Hermes-Cronus input, I plan to integrate a simple USB audio input in case I want to connect my laptop to the DAC. However, it is not meant for the main listening experiences, so I want to use a simple and cheap solution. Right know I already use SPDIF as input source from my laptop, so I thought I could use the same for my final build. I though about the miniDSP ministreamer, which converts USB to SPDIF signal. Then I will connect the Buffalo switch for I2C/SPDIF selection to a switch outside the case to control the input. Is this a good way to accomplish my goal?

Thanks!
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Old 17th February 2019, 08:03 PM   #885
francolargo is offline francolargo  United States
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Location: Twin Cities, MN
Quote:
Originally Posted by stefanhgm View Post
In addition to my BBB-Hermes-Cronus input, I plan to integrate a simple USB audio input in case I want to connect my laptop to the DAC. However, it is not meant for the main listening experiences, so I want to use a simple and cheap solution. Right know I already use SPDIF as input source from my laptop, so I thought I could use the same for my final build. I though about the miniDSP ministreamer, which converts USB to SPDIF signal. Then I will connect the Buffalo switch for I2C/SPDIF selection to a switch outside the case to control the input. Is this a good way to accomplish my goal?

Thanks!
The ministreamer is one inexpensive solution. It maxes out at 96kHz, so if you want to manage higher sample rates then perhaps its successor would be the better choice. I use the ministreamer to convert SPDIF into USB and then input USB into the BBB. It has been reliable and simple. They are no longer produced and last I looked, the only source of the older ministreamers was a few web shops in Europe.
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Old 17th February 2019, 10:28 PM   #886
ichiban is offline ichiban  United States
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Introducing the Buffalo III-SE-Pro 9028/9038
Default input USB into the BBB

Quote:
Originally Posted by francolargo View Post
and then input USB into the BBB. It has been reliable and simple.

I'd like to input USB audio from a PC into the BBB.

Currently input ethernet from PC into the BBB.

Would need to switch between ethernet & USB.

What do I need to do to accomplish this?

Setting code in BOTIC to accept USB audio?

Switching via BOTIC control rather than

a hardware switch.


-Thanks in advance
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Currently listening to a Twisted Pear Sabre Buffalo-III-SE-Pro 9038 w/mercury I/V into a BA3 preamp into an F4
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Old 18th February 2019, 02:52 AM   #887
francolargo is offline francolargo  United States
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Quote:
Originally Posted by ichiban View Post
I'd like to input USB audio from a PC into the BBB.
Hello ichiban,

Your question is not on the topic of the B3-SE-Pro so I have answered using a different thread that concerns controlling the BBB.

Your answer is here: Control of BBB-based audio appliances
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Old 18th February 2019, 11:33 AM   #888
twluke is offline twluke  Japan
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Introducing the Buffalo III-SE-Pro 9028/9038
Quote:
Originally Posted by stefanhgm View Post
-snip- Right know I already use SPDIF as input source from my laptop, so I thought I could use the same for my final build. I though about the miniDSP ministreamer, which converts USB to SPDIF signal. Then I will connect the Buffalo switch for I2C/SPDIF selection to a switch outside the case to control the input. Is this a good way to accomplish my goal?

Thanks!
The simple solution to hook up SPDIF input to the B3SEpro would be:

1. Leave the dip switch SW1-1 in the OFF position.
2. Connect a switch between A0 (pin5) and GND (pin3) of the ext_IO header, which can select either SPDIF or serial(PCM) connection.

Please read he previous discussion in #562 to #564 with the pin assignment of the ext_IO header.

Regards,
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Old 24th February 2019, 03:20 AM   #889
sbelyo is offline sbelyo  United States
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I just connected a BIII pro se 9028 and have a problem. The mute led blinks only once. I first had it connected to an Amenero chronos rhea stack via ufl. Thinking this is where the issue is I disconnected it. When I powered it up with no input connected it's the same result. I was thinking that the mute LED should be lit.

The input voltage is 4.9 Vdc All the regulators get the same amount on the input. The output from all the regulators are good

3.58 from both sides of avcc
3.3 and 3.287 from the 3.3V Regs
1.29 for the 1.3 reg

What do I check next?
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Old 24th February 2019, 05:08 AM   #890
sbelyo is offline sbelyo  United States
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Join Date: May 2004
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Quote:
Originally Posted by sbelyo View Post
I just connected a BIII pro se 9028 and have a problem. The mute led blinks only once. I first had it connected to an Amenero chronos rhea stack via ufl. Thinking this is where the issue is I disconnected it. When I powered it up with no input connected it's the same result. I was thinking that the mute LED should be lit.

The input voltage is 4.9 Vdc All the regulators get the same amount on the input. The output from all the regulators are good

3.58 from both sides of avcc
3.3 and 3.287 from the 3.3V Regs
1.29 for the 1.3 reg

What do I check next?
Upon further checking, when the BIII module has power applied it will blow a fuse after 2-3 minutes. It will also show a dead short across VD for 2-3 seconds after blowing a fuse. When I put a dummy load on the PSU it's fine and doesn't blow a fuse at any time.

It looks like the BIII module has a serious fault. Any suggestions
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